Read A Memoir on British Resources of Sands Suitable for Glass-Making: With Notes on Certain Crushed Rocks and Refractory Materials (Classic Reprint) - P G H Boswell | ePub Online

Excerpt from A Memoir on British Resources of Sands Suitable for Glass-Making: With Notes on Certain Crushed Rocks and Refractory MaterialsMinute study of the sands employed in the manufacture Of glass has revealed the fact that the very exceptional qualities displayed by the best of them are not merely those due to chemical composition, but are the outcome of their exact